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Question

Which type of joint allows movement to straighten in one direction only and is found in the elbow bends of the human body?

This question was previously asked in
RRB Technician 2026 Grade 3 Question Paper (7-Oct-2026) (Shift 3)
The correct answer is

Hinge joint

A hinge joint works like the hinge of a door: the bones can move back and forth in one plane only, bending (flexion) and straightening (extension), but cannot rotate or move sideways.

The elbow is a hinge joint, as are the knee and the joints between the bones of the fingers. At the elbow the forearm can bend towards the upper arm and straighten again, but only in that one direction.

A ball and socket joint, as in the shoulder and hip, allows movement in all directions. A pivot joint, as between the first two vertebrae of the neck, allows rotation, such as turning the head. A fixed joint, as between the bones of the skull, allows no movement.

Hence, Hinge joint.

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